公开(公告)号：US20150249392A1

公开(公告)日：2015-09-03

申请号：US14713654

申请日：2015-05-15

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Jyun-Che Ho ,  Jiun-Hung Pan ,  Chien-Fu Tang ,  Isaac Y. Chen

IPC: H02M3/335 ,  H02M1/36

CPC classification number: H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/36

Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

Abstract translation: 开关电源转换装置包括电压转换模块，检测单元和开关信号产生单元。 电压转换模块将输入电压转换为与次级侧电流相关联的输出电压，该二次侧电流流过变压器的次级绕组并且基于开关信号产生。 检测单元基于输出电压和预定参考电压产生检测信号。 切换信号生成部基于检测信号和调整信号生成切换信号，使得在开关电力转换装置的起动期间次级侧电流逐渐增大。

公开(公告)号：US09093914B2

公开(公告)日：2015-07-28

申请号：US13871286

申请日：2013-04-26

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Pei Kai Tseng ,  Chien Fu Tang ,  Isaac Y. Chen

IPC: H02J7/00 ,  H02M1/36 ,  H02M3/07 ,  H02J7/34

CPC classification number: H02M1/36 ,  H02J7/0016 ,  H02J7/345 ,  H02M3/07

Abstract: A bootstrap circuit includes: a charging voltage source; a charging diode, having an anode coupled to the charging voltage source; a high-voltage transistor, having a control terminal defined as a first connecting node and a channel coupled between a cathode of the charging diode and a bootstrap capacitor; a logic control circuit, having a first and a second logic outputs, and a logic input for receiving a charging command; a high-voltage control transistor, having a control terminal defined as a second connecting node and a channel coupled between charging voltage source and the first connecting node; a cut-off resistor, coupled between the first and the second connecting nodes; a charging control transistor, having a channel coupled between the second connecting node and a ground terminal, and a control terminal coupled to the second logic output; a control capacitor, coupled between the first connecting node and the first logic output.

Abstract translation: 引导电路包括：充电电压源; 充电二极管，具有耦合到所述充电电压源的阳极; 具有被定义为第一连接节点的控制端子和耦合在充电二极管的阴极和自举电容器之间的通道的高压晶体管; 具有第一和第二逻辑输出的逻辑控制电路和用于接收充电命令的逻辑输入; 高压控制晶体管，其具有被定义为第二连接节点的控制端子和耦合在充电电压源与第一连接节点之间的通道; 截止电阻器，耦合在所述第一和第二连接节点之间; 具有耦合在第二连接节点和接地端子之间的通道的充电控制晶体管和耦合到第二逻辑输出的控制端子; 耦合在第一连接节点和第一逻辑输出之间的控制电容器。

公开(公告)号：US20140226372A1

公开(公告)日：2014-08-14

申请号：US13869684

申请日：2013-04-24

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien Fu Tang ,  Isaac Y. Chen ,  Jiun Hung Pan ,  Yung Chih Lai ,  Jyun Che Ho

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/158 ,  H02M2001/0009

Abstract: A voltage converter circuit, includes: a power switch for generating a pulse-width-modulation (PWM) signal to drive a current load, wherein the PWM signal toggles between a first level and a second level; a sensing pin, receiving a first sensing signal when the PWM signal is at the first level, and receiving a second sensing signal when the PWM signal is at the second level; a parameter sampling and setting unit, having an input terminal coupling to the sensing pin, generating a default current or a default voltage on the sensing pin and sampling the second sensing signal to generate a sampling signal when the PWM signal is at the second level, and holding the sampling signal to set a parameter of the voltage converter circuit when the PWM signal is at the first level.

Abstract translation: 一种电压转换器电路，包括：用于产生脉宽调制（PWM）信号以驱动电流负载的电源开关，其中所述PWM信号在第一电平和第二电平之间切换; 感测引脚，当PWM信号处于第一电平时接收第一感测信号，以及当PWM信号处于第二电平时接收第二感测信号; 参数采样和设置单元，具有耦合到感测引脚的输入端，在感测引脚上产生默认电流或默认电压，并且在PWM信号处于第二电平时采样第二感测信号以产生采样信号， 并且当PWM信号处于第一电平时，保持采样信号以设置电压转换器电路的参数。

公开(公告)号：US09219352B2

公开(公告)日：2015-12-22

申请号：US14165406

申请日：2014-01-27

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chi-Hua Lin ,  Chien-Fu Tang ,  Isaac Y. Chen ,  An-Tung Chen

IPC: H02B1/24 ,  H04R3/00

CPC classification number: H02B1/24 ,  H04R3/007 ,  Y10T307/74 ,  Y10T307/766

Abstract: A power off delay circuit includes a switch connected between an external power input terminal and an internal power supply terminal, a capacitor connected to the internal power supply terminal, and a hysteresis comparator to switch the switch according to the voltages of the external power input terminal and the internal power supply terminal. During on-time of the switch, the external power input terminal is connected to the internal power supply terminal and the capacitor can be charged by the external power source. When the switch is off, the capacitor provides electric power for an internal circuit. Application of the power off delay circuit to an audio system may eliminate the turn-off pops of the audio system.

Abstract translation: 断电延迟电路包括连接在外部电源输入端子和内部电源端子之间的开关，连接到内部电源端子的电容器和滞后比较器，用于根据外部电力输入端子的电压来切换开关 和内部电源端子。 在接通时，外部电源输入端子连接到内部电源端子，电容器可以通过外部电源充电。 当开关关闭时，电容为内部电路提供电力。 将断电延迟电路应用于音频系统可以消除音频系统的关闭声音。

公开(公告)号：US09130464B2

公开(公告)日：2015-09-08

申请号：US14014642

申请日：2013-08-30

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Jyun-Che Ho ,  Jiun-Hung Pan ,  Chien-Fu Tang ,  Isaac Y. Chen

IPC: H02M3/335 ,  H02M3/36

CPC classification number: H02M3/33507 ,  H02M3/33515 ,  H02M3/33523 ,  H02M3/36

Abstract: A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

公开(公告)号：US20150070951A1

公开(公告)日：2015-03-12

申请号：US14097042

申请日：2013-12-04

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M7/06

CPC classification number: H02M7/06 ,  H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: An AC-to-DC power converting apparatus includes a power factor correction circuit generating a DC output voltage based on a rectified voltage obtained through rectifying an AC input voltage and on a PWM signal generated based on an adjustment current and a predetermined ramp signal. A multiplier-divider circuit includes: a ramp generating unit generating a ramp signal based on a clock signal and on a first detection voltage associated with the rectified voltage; a control unit generating a control signal based on the clock signal, the ramp signal, and a detection voltage generated based on the DC output voltage; and an output unit generating an adjustment signal based on an input signal associated with the rectified voltage and the control signal.

Abstract translation: AC-DC电力转换装置包括功率因数校正电路，该功率因数校正电路基于通过对AC输入电压进行整流获得的整流电压和基于调整电流和预定斜坡信号产生的PWM信号产生DC输出电压。 乘法器分频器电路包括：斜坡发生单元，其基于时钟信号和与整流电压相关联的第一检测电压产生斜坡信号; 控制单元，基于所述时钟信号，所述斜坡信号和基于所述直流输出电压生成的检测电压来生成控制信号; 以及输出单元，其基于与整流电压和控制信号相关联的输入信号生成调整信号。

公开(公告)号：US20140191732A1

公开(公告)日：2014-07-10

申请号：US13871286

申请日：2013-04-26

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Pei Kai Tseng ,  Chien Fu Tang ,  Isaac Y. Chen

IPC: H02J7/00

CPC classification number: H02M1/36 ,  H02J7/0016 ,  H02J7/345 ,  H02M3/07

Abstract: A bootstrap circuit includes: a charging voltage source; a charging diode, having an anode coupled to the charging voltage source; a high-voltage transistor, having a control terminal defined as a first connecting node and a channel coupled between a cathode of the charging diode and a bootstrap capacitor; a logic control circuit, having a first and a second logic outputs, and a logic input for receiving a charging command; a high-voltage control transistor, having a control terminal defined as a second connecting node and a channel coupled between charging voltage source and the first connecting node; a cut-off resistor, coupled between the first and the second connecting nodes; a charging control transistor, having a channel coupled between the second connecting node and a ground terminal, and a control terminal coupled to the second logic output; a control capacitor, coupled between the first connecting node and the first logic output.

Abstract translation: 引导电路包括：充电电压源; 充电二极管，具有耦合到所述充电电压源的阳极; 具有被定义为第一连接节点的控制端子和耦合在充电二极管的阴极和自举电容器之间的通道的高压晶体管; 具有第一和第二逻辑输出的逻辑控制电路和用于接收充电命令的逻辑输入; 高压控制晶体管，其具有被定义为第二连接节点的控制端子和耦合在充电电压源与第一连接节点之间的通道; 截止电阻器，耦合在所述第一和第二连接节点之间; 具有耦合在第二连接节点和接地端子之间的通道的充电控制晶体管和耦合到第二逻辑输出的控制端子; 耦合在第一连接节点和第一逻辑输出之间的控制电容器。

公开(公告)号：US20150117072A1

公开(公告)日：2015-04-30

申请号：US14526187

申请日：2014-10-28

Applicant: Richtek Technology Corp.

Inventor： Tong-Cheng Jao ,  Yi-Wei Lee ,  Isaac Y. Chen

IPC: H02M3/335

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M3/33523 ,  H02M3/33553

Abstract: A soft-start switching power converter includes a voltage converting circuit and a soft-start circuit. The voltage converting circuit includes a transformer, and a first switch which includes a first terminal connected to the transformer, a second terminal providing a trigger signal, and a control terminal receiving a control signal, and which is controlled to switch between conduction and nonconduction, such that the transformer generates a feedback voltage. The soft-start circuit receives the trigger signal, generates the control signal according to the trigger signal, and determines whether or not to clamp the control signal at a preset voltage level based on the trigger signal.

Abstract translation: 软启动开关电源转换器包括电压转换电路和软启动电路。 电压转换电路包括变压器和第一开关，其包括连接到变压器的第一端子，提供触发信号的第二端子和接收控制信号的控制端子，并且被控制为在导通和非导通之间切换， 使得变压器产生反馈电压。 软启动电路接收触发信号，根据触发信号产生控制信号，并根据触发信号确定是否将控制信号钳位在预设电压电平。

公开(公告)号：US09258857B2

公开(公告)日：2016-02-09

申请号：US14334574

申请日：2014-07-17

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Tong-Cheng Jao ,  Yi-Wei Lee ,  Isaac Y. Chen

IPC: H05B33/08 ,  H05B41/34 ,  H05B39/09 ,  H02M7/217 ,  H02M1/00

CPC classification number: H05B33/0815 ,  H02M7/2176 ,  H02M2001/0045 ,  H05B33/0812 ,  Y02B20/343 ,  Y02B20/345 ,  Y02B20/346 ,  Y02B20/347

Abstract: A light emitting system includes a series connection of a light emitting unit and a variable current source, and a voltage conversion device that includes a rectifier circuit and an output circuit. The rectifier circuit rectifies an AC voltage to generate a rectified voltage across a first rectifier output coupled to one end of the series connection of the light emitting unit and the variable current source, and a second rectifier output. The output circuit is coupled between the second rectifier output and another end of the series connection of the light emitting unit and the variable current source, and is configured to generate a direct-current (DC) output voltage.

Abstract translation: 发光系统包括发光单元和可变电流源的串联连接，以及包括整流电路和输出电路的电压转换装置。 整流电路对AC电压进行整流，以在耦合到发光单元和可变电流源的串联连接的一端的第一整流器输出和第二整流器输出之间产生整流电压。 输出电路耦合在第二整流器输出和发光单元与可变电流源的串联连接的另一端之间，并被配置为产生直流（DC）输出电压。

公开(公告)号：US09136766B2

公开(公告)日：2015-09-15

申请号：US13896631

申请日：2013-05-17

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Fu Tang ,  Tzu-Chen Lin ,  Isaac Y. Chen

IPC: H02M3/335 ,  H02M1/36

CPC classification number: H02M3/33523 ,  H02M1/36 ,  H02M3/33592 ,  Y02B70/1475

Abstract: A switching power converting apparatus is capable of converting an input voltage to an output voltage, and includes a transformer, a primary side control module, and a secondary side control module. The secondary side control module utilizes voltage clamping techniques or current-drawing techniques to stop self-excited conversion from the input voltage to the output voltage when the output voltage is greater than a predetermined target voltage, or utilizes a non-self-excited conversion architecture.

Abstract translation: 开关电力转换装置能够将输入电压转换为输出电压，并且包括变压器，初级侧控制模块和次级侧控制模块。 次级侧控制模块利用电压钳位技术或电流绘制技术在输出电压大于预定目标电压时停止从输入电压到输出电压的自激变换，或利用非自激转换结构 。